Lithium secondary battery



FIG. 1 is a first perspective view of a lithium secondary battery, illustrating our new design;

FIG. 2 is a side view thereof;

FIG. 3 is a first end view thereof;

FIG. 4 is a second, opposed end view thereof; and,

FIG. 5 is a second perspective view thereof opposite to the first perspective view shown in FIG. 1.

The broken line showing end terminals is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

We claim the ornamental design for a lithium secondary battery, as shown and described. 